CN1264720A - Non-rigid thermoplastic moulded compsns. - Google Patents
Non-rigid thermoplastic moulded compsns. Download PDFInfo
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- CN1264720A CN1264720A CN00102700A CN00102700A CN1264720A CN 1264720 A CN1264720 A CN 1264720A CN 00102700 A CN00102700 A CN 00102700A CN 00102700 A CN00102700 A CN 00102700A CN 1264720 A CN1264720 A CN 1264720A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0895—Manufacture of polymers by continuous processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
Abstract
This invention relates to thermoplastically processable, readily demouldable moulding compositions with low shrinkage and with a hardness of 65 to 85 Shore A, consisting of a mixture of A) a thermoplastic polyurethane of hardness 60 to 75 Shore A and B) a thermoplastic polyurethane of hardness 76 to 90 Shore A, which is produced continuously by a special multi-stage process.
Description
The present invention relates to moulding compound nonrigid, the easy demoulding, it comprises thermoplastic polyurethane and has low-shrinkage.
Thermoplastic polyurethane elastomerics (TPUs) is well-known for a long time.But their industrial significance is combining of known advantage that the performance of its high-grade mechanical property and thermoplasticity ground, processing at low cost produces.Adopt different chemosynthesis components, it is very wide that the variation range of mechanical properties can reach.For example be published in Kunststoffe 68 (1978), 819 and at Kautschuk about the summary of the character of TPUs and application, Gummi, Kunststoffe 35 (1982) 568.
TPUs is by linear polyalcohols, and its overwhelming majority is polyester-or polyethers-polyalcohols and synthetic by the glycol (chain extension agent) of organic vulcabond and short chain.In order to quicken formation reaction, also can add catalyzer.The mol ratio of synthetic component can in very large range change, so that regulate the character that generates product.Polyalcohols is 1 to the mol ratio of chain extension agent: 1-1: 12 are proved to be to be suitable for, and the hardness that makes product have is 80 Shore A-75 Shore D (according to DIN 53505).
The TPUs that hardness the is lower than 80 Shore A acquisition that can use the same method in theory.Yet its shortcoming is the difficulty that such product may run into processing aborning, because they are difficult to typing and solidify.
TPUs with so low hardness shows the elasticity as rubber.Therefore, the demoulding behavior of casting parts and dimensional stability usually become and make these materials be not suitable for processing in the casting industry, because their shrinkability is too high.
It is that the TPUs of 60-80 Shore A can adopt the plastic agent that comprises extraordinary phthalate and phosphoric acid ester to obtain that EP-A 0134455 discloses hardness.
EP-A 0695786 has described, and based on extraordinary polyether/polyester and plastic agent, comprise alkyl sulfonic ester or benzyl butyl phthalate mixture, and non-rigid TPUs is produced in mineral filler.
The shortcoming of these two kinds of methods is to be to use plastic agent, and it is impossible that plastic agent makes that these TPUs become in many application, wherein the most important thing is the purity of TPU material or the TPU surface quality of processing.
The object of the present invention is to provide the TPU moulding compound, but said composition is nonrigid, yielding and thermoplasticity processing, and has low-shrinkage, and do not contain plastic agent.
By TPUs of the present invention, this purpose may reach.
But the present invention relates to polyurethane moulding compound a kind of thermoplasticity processing, the easy demoulding, said composition has low-shrinkage, measure according to DIN 16770 (Part 3), its shrinking percentage is lower than 2.5%, having hardness is 65-85 Shore A (measuring according to DIN 53505), composition composed as follows
A) thermoplastic polyurethane of hardness 60-75 Shore A (measuring) 5-54 part by weight according to DIN 53505, it is as follows to originate,
1) a kind of organic diisocyanate,
2) a kind of polyester and/or polyether polyols, its number-average molecular weight be 500-5000 and
3) a kind of chain extension agent glycol, its molecular weight be 60-400 and
B) thermoplastic polyurethane of hardness 76-90 Shore A (measuring) 95-46 part by weight according to DIN 53505, it is as follows to originate,
1) a kind of organic diisocyanate,
2) a kind of polyester-and/or polyether polyols, its number-average molecular weight be 500-5000 and
3) a kind of chain extension agent glycol, its molecular weight be 60-400 and
4) Ren Xuan catalyzer, subsidiary, additive, chain terminator and releasing agent,
B wherein) obtains through the continuous steps reaction, wherein
A) one or more linearities, hydroxyl terminated polyester-and/or polyether polyols by continuously with an a kind of part of organic diisocyanate in proportion 2.0: 1-5.0: 1 mixes, and its shear can be wanted height (enough making the good mixing of component acquisition),
B) mixture that generates of step a) continues in reactor to be converted into a kind of isocyanate-terminated prepolymer＞120 ℃ of reactions until＞90% polyalcohols,
C) prepolymer that generates of step b) and residual organic diisocyanate (preferably the amount of residue be at least in the step a) organic diisocyanate amount 2.5%) mix, NCO wherein: the OH ratio is 2.05: 1-6.0: 1 for from step a) to c) total value, and NCO: the OH ratio is 0.9: 1-1.1: 1 is meant that all components is all taken into account from step a)-f)
D) mixture that generates of step c) be cooled to＜190 ℃,
E) mixture that obtains of step d) continue and intensely with one or more chain extension agent glycol be mixed to many 5 seconds and
F) mixture of step e) acquisition continues at a kind of extrusion machine internal reaction, makes it generate thermoplastic polyurethane.
Suitable organic diisocyanate 1) example comprises aliphatic series, cyclic aliphatic, araliphatic, heterocycle family and aromatic diisocyanate, is described in Justus Liebigs Annalen derChemie, 562, compound p.75-p.136 as those.
Detailed example citation is as follows: aliphatic vulcabond such as HDI, cycloaliphatic diisocyanates such as isophorone diisocyanate, 1, the 4-cyclohexyl diisocyanate, 1-methyl-2,4-cyclohexyl diisocyanate and 1-methyl-2,6-cyclohexyl diisocyanate and corresponding mixture of isomers, as 4,4 '-the double-hexyl methane vulcabond, 2,4 '-the double-hexyl methane vulcabond, with 2,2 '-mixture of double-hexyl methane vulcabond and corresponding allosome; Aromatic diisocyanate such as Toluene-2,4-diisocyanate, the 4-vulcabond, Toluene-2,4-diisocyanate, 4-vulcabond and Toluene-2,4-diisocyanate, the mixture of 6-vulcabond, 2,4 '-diphenylmethanediisocyanate and 2,2 '-diphenylmethanediisocyanate, 2,4 '-diphenylmethanediisocyanate and 4,4 '-mixture of diphenylmethanediisocyanate; Urethane-modified liquid 4,4 '-diphenylmethanediisocyanate or 2,4 '-diphenylmethanediisocyanate, 4,4 '-two isocyanide acyl diphenylphosphino ethanes (1,2) and 1,5-naphthalene diisocyanate.Following is preferred material: 1, the 6-HDI, 1, the 4-cyclohexyl diisocyanate, isophorone diisocyanate, the double-hexyl methane vulcabond contains the isomer mixture of the diphenylmethanediisocyanate that is higher than 4,4 of 96%wt/wt '-diphenylmethanediisocyanate; Particularly preferably be 4,4 '-diphenylmethanediisocyanate and 1, the 5-naphthalene diisocyanate.Above-mentioned vulcabond can use separately or use with the form of its mutual mixture.They also can use with the polymeric polyisocyanate of 15 moles of % (with respect to total vulcabond mole number) at the most.Yet, the product that the maximum of the polymeric polyisocyanate of adding must make a kind of generation, but it is still thermoplasticity processing.The polymeric polyisocyanate example comprise triphenyl methane-4,4 ', 4 " triisocyanate and polyphenylene-polymethylene-polymeric polyisocyanates.
Linear, hydroxy-end capped polyalcohols, its molecular-weight average M
nBeing 500-5000, is preferred ingredients 2).Because their production method, these materials usually contain a small amount of nonlinear compound.Thereby some such materials also often are called as " polyalcohols of substantial linear ".These materials also are fit to.Polyester-, polyethers-or polycarbonate diol or its mixture thereby preferably used.
Suitable polyether polyols (polyether glycol) can obtain by one or more alkylene oxide and a kind of startup molecular reactions that contains two reactive hydrogen atoms that comprises 2-4 carbon atom in alkylidene group.The example of alkylene oxide comprises: oxyethane, 1,2 epoxy prapane, chloro propylene oxide, 1,2-butylene oxide ring and 2,3-butylene oxide ring.Oxyethane, the mixture of propylene oxide and 1,2 epoxy prapane and oxyethane is preferably used.Alkylene oxide can be used alone, or uses as mixture.The example of suitable startup molecule comprises: water, amino alcohol, as N-alkyl-diethanolamine, for example N-methyl-diethanolamine and glycol such as ethylene ethanol, 1, ammediol, 1,4-butyleneglycol and 1,6-hexylene glycol.Starting molecule mixture also may preferentially be used.The polymerization product that other suitable Aethoxy Sklerol is a tetrahydrofuran (THF), this product comprises hydroxyl.Three functional group polyethers also can use with respect to the 0-30%wt/wt of two functional group polyethers.Yet, but the maximum that three functional group polyethers use must be to make the product that is obtained remain thermoplasticity processing.The polyether glycol of substantially linear preferably has molecular-weight average M
nBe 500-5000.They both can use separately or use with the form of mutual mixture.
Suitable polyester polyalcohols (polyester glycol) can from, for example comprise the dicarboxylic acid of 2-12 carbon atom, preferably the dicarboxylic acid of 4-6 carbon atom and polyvalent alcohol obtain.The example of suitable dicarboxylic acid comprises: aliphatic dicarboxylic acid such as succsinic acid, pentanedioic acid, hexanodioic acid, suberic acid, nonane diacid and sebacic acid, or aromatic dicarboxylic acid such as phthalandione, m-phthalic acid and terephthalic acid.Dicarboxyl acid can be used separately or for example use with the mixture of succsinic acid, pentanedioic acid and hexanodioic acid as mixture.As comprise the dicarboxylic diester of 1-4 carbon atom in their alcohol radical, it may be favourable that dicarboxylic anhydride or dicarboxylic acid acyl chlorides replace dicarboxylic acid to produce polyester glycol with the derivative of corresponding dicarboxylic acid.Examples of polyhydric alcohols comprises the glycols that contains 2-10 carbon atom, is preferably the glycols of 2-6 carbon atom, as ethylene glycol, and Diethylene Glycol, 1,4-butyleneglycol, 1,5-pentanediol, 1,6-hexylene glycol, decamethylene-glycol, 2,1, ammediol and dipropylene glycol.According to required character, these polyvalent alcohols can use separately or use with mutual mixture.The carbonic ether of said dibasic alcohol also is suitable, particularly those comprise the glycol of 4-6 carbon atom, as 1,4-butyleneglycol or 1, the 6-hexylene glycol, the condensation product of 'omega '-hydroxy carboxylic acid such as ω-hydroxycaproic acid, or the polymerisate of the polymerisate of lactone such as ω-caprolactone, this product are optional substituted.The polyester adipate of ethylene glycol, 1,4-butyleneglycol polyester adipate, ethylene glycol-1,4-butyleneglycol polyester adipate, 1,6-hexylene glycol-Xin-pentanediol polyester adipate, 1,6-hexylene glycol-1,4-butyleneglycol polyester adipate and polycaprolactone are to use preferably as polyester glycol.It is 500-5000 that these polyester glycols have average molecular mass Mn, and can use separately or use with mutual form of mixtures.
The chain extension agent 3 that uses) be glycols and perhaps glycol with in a small amount, molecular weight is the diamines of 60-400, preferred ester family glycol includes 2-14 carbon atom, as ethylene glycol, 1,6-hexylene glycol, Diethylene Glycol, dipropylene glycol and particularly preferably be 1, the 4-butyleneglycol.But, but the maximum of the diamines of use must make the product that obtains remain thermoplasticity processing.Suitable chain extension agent also comprises the terephthalic acid diester of the glycol that contains 2-4 carbon atom, for example right-phthalandione-two-glycol ester or right-phthalandione-two-1,4-butanediol ester, the hydroxyalkyl ether of quinhydrones, as 1,4-two (beta-hydroxy ethyl)-quinhydrones, the bis-phenol of ethoxylation, as 1,4-two (beta-hydroxy ethyl)-dihydroxyphenyl propane, (ring) aliphatic diamine, as isophorone diamine, quadrol, 1,2-propylene diamine, 1, the 3-propylene diamine, N-methyl-the third-1,3-diamines or N, N '-dimethyl-ethylenediamine and aromatic diamine are as 2,4 di amino toluene, 2,6-diaminotoluene, 3,5-diethyl-2,4-diaminotoluene or 3,5-diethyl-2,4 di amino toluene, or the one-level list-, two-, three-or four-alkyl replacement-4,4 '-diaminodiphenyl-methane.Ethylene glycol, 1,4-butyleneglycol, 1, the 6-hexylene glycol, 1, two (beta-hydroxy the ethyl)-quinhydrones or 1 of 4-, two (beta-hydroxy the ethyl)-dihydroxyphenyl propanes of 4-preferably are used as chain extension agent.The mixture of above-mentioned chain extension agent also can be used.In addition, a spot of triol also can be added into.But, but the maximum of the triol of use must make the product that obtains remain thermoplasticity processing.
The compound of common single functional group also can add on a small quantity for example as chain extension agent or releasing agent.The example comprises alcohols, as octanol and Stearyl alcohol or amine, as butylamine and octadecylamine.
TPUs can be from above-mentioned synthetic component, and optional catalyzer exists, and auxiliary substance and/or additive obtain.Synthetic component reaction is to be undertaken by such metering, and promptly the NCO base is 0.9 to the respond equivalence ratio of total amount of active group (the OH yl of low molecular weight diols/triol or many alcohol especially) of those and NCO: 1.0-1.1: 1.0.Preferred ratio is 0.95: 1.0-1.10: 1.0.
Appropriate catalyst comprises from the known common tertiary amine of prior art, as triethylamine, dimethylcyclohexylam,ne, N-methylmorpholine, N, N '-lupetazin, 2-(dimethylamino-oxyethyl group) ethanol, diazabicyclo [2,2,2] octane and analogue, and organometallics particularly, as titanic acid ester, iron cpd or tin compound, as the dialkyltin salts of stannous acetate, stannous octoate, the inferior tin of lauric acid or aliphatic carboxylic acid, as dibutyl tin diacetin or dibutyl tin two lauric acid salt or analogues.Preferred catalyzer is an organometallics, particularly titanic acid ester, iron cpd and tin compound.
The example of suitable auxiliary substance comprises internal lubricant such as fatty acid ester and metallic soap class thereof, the fatty acid acyl amine, the fatty acid ester amides, and silicon compound, anti-extension agent, inhibitor, stablizer, fire retardant, staining agent, the pigment of anti-hydrolysis, light, heat and decolouring, inorganic and/or organic filler and toughener.Especially, toughener comprises fiber reinforced material such as inorganic fibre, and for example they can also can coat sizing material by prior art production.The more detailed material of aforesaid auxiliary substance and additive is published in the special document, as J.H.Saunders and K.C.Frisch work, " superpolymer " XVI rolls up polyurethane, the 1st and part 2, IntersciencePnblisher, version in 1962 and 1964, and R respectively, Gachter and H.Muller work, Taschenbuch fur Kunststoff-Additive (Hanser Verlag Munich 1990) or in DE-A 2901774 patent documentations.
Other additive that is included among the TPU comprises thermoplastic additive such as polycarbonate and acrylonitrile/butadiene/styrene trimer, particularly ABS.In other elasticator also may be included in, as rubber, ethylene/acetic acid vinyl ester copolymer, styrene/butadiene copolymers and other TPUs.Other material that is suitable for processing comprises the plastic agent that commodity can get, as phosphoric acid fat, phthalate, adipic acid ester, sebate and alkyl sulfonic ester.
TPU A) (" non-rigid component ") is to obtain by the mol ratio of adjusting polyalcohols to chain extension agent, and its Shore A hardness is 60-75, and preferred Shore A hardness is 65-70.
TPU A) can produce in batches or continuously.Foremost industrial process is belt delivering method (GB-A 1057018) and pressing method (DE-A 1964834, DE-A 2059570 and US-A 5795948).
TPU B) (" rigidity component ") also is to obtain by the mol ratio of adjusting polyalcohols to chain extension agent, and its ShoreA hardness is 76-90, and preferred hardness is 82-88.
TPU B) produce by following multistep method (being similar to EP-A 0816407):
In step b), in order to generate prepolymer, the amount of reactive component is chosen such that vulcabond 1) part 1 and polyalcohols 2) NCO: the ratio of OH is 2.0: 1-5.0: 1, preferred NCO/OH ratio is 2.05: 1-3.0: 1.In the machining cell that high shear energy is provided, component is continuous blended.A kind of mixed gear end, preferably, a kind of high speed tooth rolls mixing machine, and a kind of quiet mixing machine or jet mixer can use.
In step b), prepolymer reacts at a kind of reactor as carrying out continuously in pipeline reactor.Comprise pipeline or a kind of stirring pipeline (line mixer) of quiet mixing tank, its length/diameter ratio is higher than 4: 1, is preferably used).
In particularly preferred embodiment, step a) and b) at injection/pipe-line equipment, this equipment has quiet mixing tank, or in the line-blending machine, finish.
According to the present invention, the prepolymer reaction in step b) should proceed to basically and transform fully, promptly is higher than the transformation efficiency of 90 moles of % with respect to polyalcohols.The temperature of reaction is more than 120 ℃, and preferred temperature of reaction is 140 ℃-220 ℃.
In step c), vulcabond 1) part 2 is mixed rapidly.In order to reach this purpose, in pipeline, preferably use one or more quiet mixing tanks.A kind of jet mixer, the hydrid component of a kind of mixed gear end or a kind of extrusion machine also can be used.
The mixture that generates in step c) is cooled in step d) and is lower than 190 ℃, and preferred temperature is for being lower than 170 ℃.If necessary, the pipeline that is cooled, or the cooling-part that has an extrusion machine of feed pieces also is the equipment that is fit to this purpose.Preferably, outside a kind of, cool off in the extrusion machine of cooling twin screw.
In step e), chain extension agent 3) within 5 seconds, mix with the refrigerative pre-polymer mixture.For this step, a kind of mixer unit that can move with high shear also is preferred.The example comprises the extrusion machine of the high speed wriggling of a kind of mixed gear end, mixing machine spray gun or a kind of low capacity.The mixing effect of strengthening by the mixer part of extrusion machine preferably.
In step (f), the mixture of reaction is continuously at a kind of extrusion machine, reacts in for example a kind of twin-screw extruder, generates thermoplastic polyurethane.Temperature of reaction is 140 ℃-250 ℃.Among the process of this step, the cavity of extrusion machine is heated or its second method is neither to heat also not cool off, and allows directly produce thermal radiation towards periphery.This temperature control forms is referred to as " quasi-adiabatic " mode.
According to the present invention, TPUs A) (non-rigid) and B) (rigidity) can be mixed in the powder mixer that commodity can get generates moulding compound.Certainly, in the further first being processed of reality, thermoplasticity procedure of processing routinely is under melting condition, TPUs A) and B) for example by extruding and be converted into uniform powdered material and mix.
According to the present invention, moulding compound is very soft (65-85 ShoreA) and have good mechanical properties.When they add man-hour by injection molded, they are easy demouldings.Because their low-shrinkage, has good demoulding stability by the parts of their injection moldeds.
According to the present invention, moulding compound is used to produce nonrigid, flexible injection molded parts, as sole, handle lid, expansion bellows and dw, and is used to produce extrusion sections, as flat board, and film and section.Moulding compound also can combine with other thermoplastic material, is shaped and/or coextrusion processing by multi component injection molding.
The present invention will be described in more detail with following embodiment.
Embodiment
Method 1: the quiet mixing tank/rapid method of ZSK multistep
Polyester has wherein dissolved 150ppm two stannous octoates (with respect to polyester) as catalyzer, is heated to 150 ℃ and be metered into continuously in the quiet mixing tank (Sulzer manufacturing).4,4 '-part 1 (2.45 moles) of diphenylmethanediisocyanate (60 ℃) pumps into quiet mixing tank simultaneously.In quiet mixing tank, 99% (with respect to polyester) is converted into prepolymer, finishes in 30 seconds.By the second quiet mixing tank (Sulzer manufacturing), 4,4 '-part 2 (1.09 moles) of diphenylmethanediisocyanate mixes with prepolymer, lasts for 5 seconds.Reaction mixture joins ZSK83 (Werner ﹠amp with being measured; Pfleiderer makes) cavity 1 in and be cooled therein, in lower chamber, reach about 140 ℃.0.4%wt/wt (with respect to TPU) is two-and ethylene-kemanide S is added in the cavity 1.1, the 4-butyleneglycol is added in the cavity 5, and mixes with prepolymer-MDI mixture, and its hybrid mode is a mixing effect fierce in the mixer element of a weak point, and this mixer element is positioned under the cavity 6.
In the final section of extrusion machine, reactive component is had an effect, and generates TPU.The temperature of reaction is 150-220 ℃.The speed of rotation of worm screw is 300 rev/mins.
In the terminal of extrusion machine, the heat fusing thing is extruded with the silk thread shape, and is cooled in water-bath, then granulation.
Method 2: quiet mixing tank single stage method
Polyester is added in the container that butyleneglycol is housed and is heated to about 200 ℃, this mixture be heated to 180 ℃ 4,4 '-diphenylmethanediisocyanate joins (Sulzer manufacturing) in the quiet mixing tank together continuously.Two stannous octoates of 250ppm (with respect to polyester) are dissolved in the polyester as catalyzer.The downstream of quiet mixing tank, wherein the residence time is about 1 second, product stream is admitted to first cavity (about 200 ℃ of temperature) of Welding extrusion machine.The diethylene kemanide S of 0.8%wt/wt (with respect to TPU) is added in the above-mentioned cavity continuously.The speed of rotation of worm screw is 110 rev/mins.In the terminal of extrusion machine, polymer melt is carried out granulation by underwater pelletizer (Gala manufacturing).
Method 3: mixed gear end/belt single stage method
Polyester, two stannous octoates that wherein are dissolved with 150ppm (with respect to polyester) are heated to 150 ℃ as catalyzer, and with butyleneglycol and 4,4 '-diphenylmethanediisocyanate (60 ℃) together, at mixed gear end, mixed continuously.The reaction mixture of gained directly is deposited on above the travelling belt, and this band passes through 140 ℃ heating zone, about 3 minutes of time continuously.The solidified melts is admitted to ZSK 83 (temperature: 140-200 ℃) in the terminal of travelling belt.Two-ethylene octadecyl acid amides of 0.4%wt/wt (with respect to TPU) is added into the centre of extrusion machine.The speed of rotation of extrusion machine is 300 rev/mins.In the extrusion machine terminal, the heat fusing thing is extruded with the silk thread shape, is cooled in water-bath and granulation.
The two step method of method 4:ZSK
Polyalcohols wherein dissolves 150ppm (with respect to polyalcohols) two stannous octoates as catalyzer, is heated to 140 ℃ and joined continuously in first cavity of ZSK 83 (Wermer/Pfleiderer manufacturing).Whole 4,4 '-diphenylmethanediisocyanate (60 ℃) is added in the same cavity.1, the 4-butyleneglycol is joined in the cavity 7 continuously.The 13rd cavity of ZSK is heated gradually, from 140 ℃ to 240 ℃.The speed of rotation of worm screw is 300 rev/mins.Reinforced speed is conditioned, and makes that in the residence time of ZSK internal reaction component approximately be 1 minute.In the terminal of extrusion machine, the heat fusing thing is extruded with the silk thread shape, is cooled in water-bath and granulation.
Method 5: stirring-head/cast panel single stage method
Polyester, the acetopyruvic acid titanyl that wherein dissolves 20ppm (with respect to polyester) are heated to 180 ℃ as catalyzer, and in reaction vessel, with butyleneglycol and 4,4 '-diphenylmethanediisocyanate (60 ℃) together, mixed by stirring (2000 rev/mins).After one minute, the product of acquisition is cast plate and is annealed 30 minutes at 140 ℃.
Annealing and refrigerative plate are cut and pulverize.
Press the data of table 2, the TPU powder is mixed and be processed into the injection moulding module.
The production of injection moulding module
In the D60 injection molding machine (worm 32) that a Mannesmann makes, the TPU powder is melted (about 225 ℃ of material temperature), and is molded into rod (die casting temperature; 40 ℃; Rod size: 80 * 10 * 4 millimeters) or become plate (die casting temperature: 40 ℃; 125 * 50 * 2 millimeters).
Measuring
Measurement of hardness is undertaken by DIN 53505, and 100% modulus measurements is undertaken by DIN 53504.
Shrinkability, it is important to the workability evaluation of injection molded spare, measures by DIN 16770 (Part 3).
After the injection moulding module annealing (80 ℃/15 hours), its vertical relatively shrinkability measuring result is shown in the table 2 with the percentage table of module length.
From test-results as seen, have non-rigid TPU low-shrinkage (＜2.5%), that be used for the injection moulding module, can obtain by a kind of mixture of TPU B that comprises according to the present invention, the rigidity of its mixture/non-rigid ratio is 90/10-50/50.
Ratio obviously increases (comparative example 4 and 5) less than the shrinkability of 50/50 mixture, and it is that injection molded industry institute is unacceptable.
Comprise same rigidity, but the similar results that the mixture of non-TPUs of the present invention (comparative example 6 and 7) has shrinkability to increase.Have Shore A hardness 75 ± 2, but be not the phenomenon that a kind of (rigidity/non-rigid) TPU mixture (relatively agent 8) also has shrinkability to increase.
Table 2: test-results
*Comparative example
| Test | TPU B rigidity | TPU A is non-rigid | ?TPU?B/TPU?A | The character of moulding compound | ||
| Parts by weight/parts by weight | Hardness (Shore A) | 100% modulus [MPa] | Shrinking percentage [%] | |||
| 1 | TPU?1 | ?TPU?2 | ????90/10 | ????84 | ????5.1 | ????1.1 |
| 2 | TPU?1 | ?TPU?2 | ????70/30 | ????76 | ????4.5 | ????1.9 |
| 3 | TPU?1 | ?TPU?2 | ????50/50 | ????76 | ????3.7 | ????2.3 |
| 4 * | TPU?1 | ?TPU?2 | ????45/55 | ????74 | ????3.9 | ????5.8 |
| 5 * | TPU?1 | ?TPU?2 | ????40/60 | ????75 | ????3.8 | ????7.0 |
| 6 * | TPU?3 | ?TPU?2 | ????50/50 | ????82 | ????4.2 | ????2.7 |
| 7 * | TPU?4 | ?TPU?2 | ????50/50 | ????76 | ????3.7 | ????3.5 |
| 8 * | ??100?TPU?5 | ????73 | ????4.4 | ????2.7 | ||
Table 1:TPUs composition
| ??TPU | TPU raw material raw material molecular weight of polyesters [mole] | Chain extension agent [mole] vulcabond 1 | [mole] | Hardness | Production method | |
| ??1 | Oneself 2,000 1.00 two acid esters of butyleneglycol | Butyleneglycol 2.5 | ????MDI | ????3.5 | ??85??Shore?A | The rapid method of multistep: method 1 |
| ??2 | Oneself 1,450 1.00 two acid esters of butyleneglycol | Butyleneglycol 0.9 | ????MDI | ????1.9 | ??68??Shore?A | Single stage method: method 2 |
| ??3 | Oneself 2,000 1.00 two acid esters of butyleneglycol | Butyleneglycol 2.4 | ????MDI | ????3.5 | ??85??Shore?A | Single stage method: method 3 |
| ??4 | Oneself 2,200 1.00 two acid esters of butyleneglycol | Butyleneglycol 2.6 | ????MDI | ????3.6 | ??85??Shore?A | Two step method: method 4 |
| ??5 | Oneself 1,800 1.00 two acid esters of butyleneglycol | Butyleneglycol 1.6 | ????MDI | ????2.6 | ??73??Shore?A | Single stage method: method 5 |
Claims (3)
1. thermoplastic composition, its Shore A hardness is determined as 65-85 by DIN 53505, and its shrinkability is measured by DIN 16770 (Part 3) and is lower than 2.5%, and its mix ingredients comprises,
A) by weight, first kind of thermoplastic polyurethane of 5-54 part, it is by a kind of organic vulcabond, a kind of polyester polyalcohols of substantial linear and/or a kind of number-average molecular weight are that the polyether polyols of 500-5000 and chain extension agent glycol that a kind of molecular weight is 60-400 generate, the Shore A hardness of said first kind of thermoplastic polyurethane be 60-75 and
B) by weight, second kind of thermoplastic polyurethane of 95-46 part, the successive processes of its preparation comprise,
A) under high shear conditions, mix a kind of organic vulcabond and at least a substantially linear, number-average molecular weight is the polyalcohols of 500-5000, wherein polyalcohols is to select from one group of polyalcohols of being made up of polyether polyols and polyester polyalcohols, the NCO/OH ratio is 2.0: 1-5.0: 1, generate first kind of mixture and
B) in temperature is higher than 120 ℃ reactor, make the component reaction of said first kind of mixture, the transformation efficiency that reaches with respect to said polyalcohols is higher than 90%, and generate a kind of isocyanate-terminated prepolymer and
C) said prepolymer mixes with the organic diisocyanate of interpolation, makes that the NCO/OH ratio is 2.05: 1-6.0: 1, generate second kind of mixture and
D) said second kind of mixture is cooled to be lower than 190 ℃ and
E) be that the chain extension agent glycol of 60-400 is mixed to many 5 seconds with at least a molecular weight continuously with said second kind of mixture, obtain the third mixture and
F) component that makes said the third mixture generates said second kind of thermoplastic polyurethane continuously at the extrusion machine internal reaction,
Said second kind of thermoplastic polyurethane is characterised in that its NCO: the OH ratio is 0.9: 1-1.1: 1, and its Shore A hardness is 76-90; Said composition is characterised in that its easy demoulding and is not have under the condition of softening agent to have low mold shrinkage.
2. the composition in the claim 1, wherein organic diisocyanate both common and independent of each other be at least a following compound that is selected from: 4,4 '-diphenylmethanediisocyanate, isophorone diisocyanate, 1, the 6-hexamethylene diisocyanate, 1,5-naphthalene diisocyanate and 4,4 '-the dicyclohexyl vulcabond.
3. the composition in the claim 1, wherein the chain extension agent glycol both be at least a following compound that is selected from jointly and independently of one another: 1,6-hexylene glycol, 1,4-butyleneglycol, ethylene glycol and 1, two (beta-hydroxy the ethyl)-quinhydrones of 4-.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19907987.0 | 1999-02-25 | ||
| DE19907987A DE19907987C2 (en) | 1999-02-25 | 1999-02-25 | Soft, thermoplastic molding compounds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1264720A true CN1264720A (en) | 2000-08-30 |
| CN1144842C CN1144842C (en) | 2004-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB00102700XA Expired - Fee Related CN1144842C (en) | 1999-02-25 | 2000-02-25 | Non-rigid thermoplastic moulded compsns. |
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| Country | Link |
|---|---|
| US (1) | US6218479B1 (en) |
| EP (1) | EP1031588B1 (en) |
| JP (1) | JP4725937B2 (en) |
| KR (1) | KR100591228B1 (en) |
| CN (1) | CN1144842C (en) |
| AT (1) | ATE281483T1 (en) |
| BR (1) | BR0000911B1 (en) |
| CA (1) | CA2299079C (en) |
| DE (2) | DE19907987C2 (en) |
| ES (1) | ES2231056T3 (en) |
| HK (1) | HK1028781A1 (en) |
| TW (1) | TW591044B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770473A (en) * | 2010-02-26 | 2012-11-07 | 巴斯夫欧洲公司 | Catalyzed granulate tempering for thermoplastic polyurethanes |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10029076A1 (en) * | 2000-06-13 | 2001-12-20 | Wolff Walsrode Ag | Thermoplastic elastomer compounds with improved machinability during extrusion |
| KR100553252B1 (en) * | 2002-02-01 | 2006-02-20 | 아바고테크놀로지스코리아 주식회사 | Power Amplification Apparatus of Portable Terminal |
| KR20030067342A (en) * | 2002-02-08 | 2003-08-14 | 주식회사 효성 | Method for Preparing Thermoplastic Polyurethane, The Polyurethane and Polyurethane Elastic Fiber Produced by Using The Same |
| DE10206839A1 (en) * | 2002-02-18 | 2003-09-11 | Freudenberg Carl Kg | Thermoplastic processable polyurethane molding compound |
| DE50306005D1 (en) * | 2002-02-23 | 2007-02-01 | Bayer Materialscience Ag | Process for the preparation of soft, easily demoldable thermoplastic polyurethane elastomers with low shrinkage |
| DE102005019663A1 (en) * | 2005-04-26 | 2006-11-02 | Basf Ag | New thermoplastic polyurethane useful in plastic, automobile-, re-molding industry, foils and cable sheathing |
| US20080139774A1 (en) | 2006-12-11 | 2008-06-12 | Lawrey Bruce D | Soft thermoplastic polyurethane elastomers and processes for their preparation and use |
| DE102007037037B3 (en) | 2007-08-06 | 2009-02-12 | Mtu Friedrichshafen Gmbh | Method for controlling an internal combustion engine |
| US8455608B2 (en) | 2010-02-26 | 2013-06-04 | Basf Se | Catalyzed pellet heat treatment for thermoplastic polyurethanes |
| KR101050266B1 (en) * | 2010-08-02 | 2011-07-19 | 김재호 | Luminous composite materials with thermoplastic polyurethane elastomer and a method thereof |
| DE102013018101A1 (en) * | 2013-10-23 | 2015-04-23 | Kraiburg Tpe Gmbh & Co. Kg | Thermoplastic elastomer compositions with silicone oil resistance |
| KR101864940B1 (en) * | 2016-09-21 | 2018-06-05 | 국방과학연구소 | Thermal insulation foams for high explosive |
| EP3838949A1 (en) * | 2019-12-17 | 2021-06-23 | Covestro Deutschland AG | Method for the continuous production of a thermoplastic polyurethane |
| EP3838955A1 (en) * | 2019-12-17 | 2021-06-23 | Covestro Deutschland AG | Method for producing thermoplastic polyurethane having low melting enthalpy |
| BR112022016996A2 (en) | 2020-02-28 | 2022-10-25 | Basf Se | FOAMED PELLETS, FOAMED PELLET PRODUCTION PROCESS, USE OF FOAMED PELLETS AND HYBRID MATERIAL |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BE673744A (en) | 1964-12-14 | |||
| BE759829A (en) | 1969-12-03 | 1971-06-03 | Upjohn Co | PREPARATION OF POLYURETHANES |
| DE1964834A1 (en) | 1969-12-24 | 1971-07-01 | Bayer Ag | Polyurethane elastomers mfr by direct reac - tion in extruder |
| DE2901774A1 (en) | 1979-01-18 | 1980-07-24 | Elastogran Gmbh | Polyurethane elastomer free running dyestuff or auxiliary concentrate - is resistant to microbes and stable, and mixes well with elastomer |
| DE3241666A1 (en) | 1982-11-11 | 1984-05-17 | Basf Ag, 6700 Ludwigshafen | Easily demoldable and non-blocking, thermoplastic polyurethane elastomers, process for their production and use |
| DE3323520A1 (en) | 1983-06-30 | 1985-01-10 | Basf Ag, 6700 Ludwigshafen | SOFT, RUBBER-ELASTIC, THERMOPLASTIC POLYURETHANES, METHOD FOR THE PRODUCTION AND USE THEREOF |
| DE3903537A1 (en) * | 1989-02-07 | 1990-08-09 | Basf Ag | REFRIGERANT IMPACT TOE, FLOWABLE, THERMOPLASTIC POLYURETHANE ELASTOMER COMPOSITIONS, METHOD FOR THEIR PRODUCTION AND THEIR USE |
| JP2626824B2 (en) * | 1989-12-08 | 1997-07-02 | 大日精化工業株式会社 | Pearl glossy resin composition |
| DE4107454A1 (en) * | 1991-03-08 | 1992-09-10 | Basf Ag | COMPOSITION ELEMENTS FROM A COVER AND SUPPORT LAYER OF THERMOPLASTIC POLYURETHANES, A METHOD FOR THEIR PRODUCTION AND THEIR USE |
| US5795948A (en) | 1992-05-26 | 1998-08-18 | Bayer Aktiengesellschaft | Multistage process for production of thermoplastic polyurethane elastomers |
| DE4426943A1 (en) | 1994-07-29 | 1996-02-01 | Bayer Ag | Polyurethane molding compounds |
| DE19625987A1 (en) * | 1996-06-28 | 1998-01-02 | Bayer Ag | Process for the continuous production of thermoplastically processable polyurethanes with improved processing behavior |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102770473A (en) * | 2010-02-26 | 2012-11-07 | 巴斯夫欧洲公司 | Catalyzed granulate tempering for thermoplastic polyurethanes |
| CN102770473B (en) * | 2010-02-26 | 2015-02-18 | 巴斯夫欧洲公司 | Catalyzed granulate tempering for thermoplastic polyurethanes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000248171A (en) | 2000-09-12 |
| DE19907987C2 (en) | 2001-05-23 |
| JP4725937B2 (en) | 2011-07-13 |
| CN1144842C (en) | 2004-04-07 |
| ES2231056T3 (en) | 2005-05-16 |
| KR100591228B1 (en) | 2006-06-19 |
| KR20000058166A (en) | 2000-09-25 |
| TW591044B (en) | 2004-06-11 |
| BR0000911A (en) | 2000-10-24 |
| BR0000911B1 (en) | 2009-01-13 |
| EP1031588A1 (en) | 2000-08-30 |
| ATE281483T1 (en) | 2004-11-15 |
| EP1031588B1 (en) | 2004-11-03 |
| HK1028781A1 (en) | 2001-03-02 |
| US6218479B1 (en) | 2001-04-17 |
| DE19907987A1 (en) | 2000-08-31 |
| DE50008457D1 (en) | 2004-12-09 |
| CA2299079C (en) | 2008-07-08 |
| CA2299079A1 (en) | 2000-08-25 |
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